Extraction:
Pulling
the tree from the forest area (or ‘stump’) to
a landing is referred to as extraction. When the tree’s
are dragged out of the forest it is called skidding, when
they are carried out on a trailer (forwarder) it is called
forwarding. Any harvesting system that uses an extraction
machine that drives into the forest is referred to as ground-based
harvesting. By far the most common machine to carry out
this task is the grapple skidder or the cable skidder. Forwarders,
agricultural tractors, ATV’s and horses are also options
for ground-based extraction. When extracting in very wet
areas, it is possible to use a shovel, a machine that can
lay out corduroy roads and ‘shovel’ the trees
to those roads for the skidders. Two special extraction
machines are a helicopter (aerial logging) and a yarder
(cable logging)
Equipment
and Machinery used for extraction:
•
Cable Skidder
• Grapple Skidder
• Clam bunk
skidder
• Forwarder
• Shovel
• Agricultural
Tractor
• Tracked
skidder / Bulldozer
• Cable Yarder
• Helicopter
• Animal Power
• Dual
Tire Pressure Grapple Skidder
